High-purity microlite wear-resisting alumina lining and preparation method thereof

A technology of alumina and phase alumina, which is applied in the field of high-purity fine-grained wear-resistant alumina liner and its preparation, can solve the problems of increasing the manufacturing cost of the liner, prolonging the life of parts, limiting the size and shape of the liner, etc., and achieving Improved hardness and wear resistance, easy control of process parameters, and stable mass production

Active Publication Date: 2018-07-20
淄博启明星新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the patent does not give performance indicators such as fracture toughness, only that the service life of the components is greatly extended
At the same time, carbon fiber is relatively expensive, and sintered dense

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The first step is to select industrial alumina and add it to the roller ball mill, add pseudo-boehmite with a total mass fraction of 3% of alumina and 0.2% of silica sol with a mass fraction of 16%, wet-mill and mix with industrial alumina and refine Material, obtain the fine particle mixed slurry that can pass through 600 mesh sieves;

[0046] In the second step, the fine particle mixed slurry prepared in the first step is filtered and flash-dried to obtain a dry powder, which is calcined at 900°C for 4 hours to make the phase change of industrial alumina to form a fine-grained α phase Alumina A with a particle size distribution of D50 at 1.0 micron;

[0047]The third step is to select commercially available high-temperature calcined alumina, add it to a drum-type ball mill, add magnesium fluoride with a total mass fraction of 0.2% of alumina and boric acid with a total mass fraction of 0.6%, dry-mix ball mill together and refine the materials to obtain Fine particle ...

Embodiment 2

[0060] The first step is to select industrial alumina and add it to the roller ball mill, add pseudo-boehmite with a total mass fraction of 6% of alumina and 0.3% of silica sol with a mass fraction of 18%, and wet-mill with industrial alumina and refine Material, obtain the fine particle mixed slurry that can pass through 600 mesh sieves;

[0061] In the second step, the fine particle mixed slurry prepared in the first step is filtered and flash-dried to obtain a dry powder, which is calcined at 1100°C for 4 hours to make the industrial alumina phase change into a fine-grained α phase Aluminum oxide A with a particle size distribution of D50 at 1.5 microns;

[0062] The third step is to select commercially available high-temperature calcined alumina, add it to a roller ball mill, add magnesium fluoride with a total mass fraction of 0.1% of alumina and boric acid with a total mass fraction of 0.8%, dry-mix ball milling and refine the materials together, and obtain Fine particl...

Embodiment 3

[0075] The first step is to select industrial alumina and add it to the roller ball mill, add pseudo-boehmite with a total mass fraction of 10% of alumina and 0.1% of silica sol with a mass fraction of 20%, wet milling and mixing with industrial alumina and refine Material, obtain the fine particle mixed slurry that can pass through 600 mesh sieves;

[0076] In the second step, the fine-grain mixed slurry prepared in the first step is filtered and flash-dried to obtain a dry powder, which is calcined at 800°C for 4 hours to make industrial alumina phase change into a fine-grained α phase Aluminum oxide A with a particle size distribution of D50 at 0.6 microns;

[0077] The third step is to select commercially available high-temperature calcined alumina, add it to a roller ball mill, add magnesium fluoride with a total mass fraction of 0.3% of alumina and boric acid with a total mass fraction of 0.4%, dry-mix ball mill together and refine the materials to obtain Fine particle ...

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Abstract

The invention belongs to the field of alumina ceramics in inorganic non-metal materials, and particularly relates to a high-purity microlite wear-resisting alumina lining plate and a preparation method thereof. The method comprises the steps that the high-purity microlite wear-resisting alumina lining plate is generated by performing the mixing, sanding, spray granulation, modling and sintering onalpha phase alumina A and alpha phase alumina B; pseudo-boehmite, silica sol and industrial alumina are performed with wet-grinding, mixing and refining to obtain fine-particle mixed slurry capable of passing through a 600-mesh screen, and the mixed slurry is performed with pressure filtration, flash evaporation drying and calcination to obtain the alpha phase alumina A; magnesium fluoride, boricacid and high temperature calcined alumina are performed with dry-mixing, ball-milling and refining to obtain fine-particle powder capable of passing through a 180-mesh screen, and the fine-particlepowder is calcined to obtain alpha phase alumina B. The high-purity microlite wear-resisting alumina lining plate and the preparation method thereof have the advantages that the bimodal distribution of grain size is obtained in a microstructure, and a small amount of anisometric crystal exists in the microstructure, thereby improving the hardness and wear resistance of the alumina lining plate; the invention also provides a preparation method of the high-purity microlite wear-resisting alumina lining plate, the process is simple and convenient, the process parameters are controlled easily, andstable mass production can be performed.

Description

technical field [0001] The invention belongs to the field of alumina ceramics among inorganic non-metallic materials, and in particular relates to a high-purity fine-grain wear-resistant alumina liner and a preparation method thereof. Background technique [0002] In the fields of metallurgy, mining, electric power and chemical industry, it is necessary to use conveyor belts to transport hard mineral raw materials. In the past, oily nylon plates or polymer liners were often used to consign materials on conveyor belts, but due to poor wear resistance, material blocking often occurs , the liner needs to be replaced, resulting in increased maintenance costs and reduced efficacy. Subsequently, people used cast iron as the wear-resistant liner. Although the wear resistance has been greatly improved, the problem of wear resistance has not been solved for hard materials. Therefore, the use of high-hardness alumina ceramics as a wear-resistant lining has become an inevitable choice...

Claims

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Application Information

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IPC IPC(8): C04B35/111C04B35/626C04B35/622
CPCC04B35/111C04B35/622C04B35/62605C04B35/62675C04B2235/3218C04B2235/3409C04B2235/3418C04B2235/445C04B2235/5436C04B2235/5445C04B2235/656C04B2235/786C04B2235/96
Inventor 蒋丹宇吴事江杨焕顺李拯
Owner 淄博启明星新材料股份有限公司
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